Commit f0a6416b authored by Sinisa@sinisa.nasamreza.org's avatar Sinisa@sinisa.nasamreza.org
Browse files

UNIONs : further work

parent 8060b31a

sql/sql_lex.h

+1 −1
Original line number Diff line number Diff line
@@ -180,7 +180,7 @@ typedef struct st_lex { 
  enum enum_ha_read_modes ha_read_mode;

  enum ha_rkey_function ha_rkey_mode;

  enum enum_enable_or_disable alter_keys_onoff;

  uint grant,grant_tot_col,which_columns;

  uint grant,grant_tot_col,which_columns, union_option;

  thr_lock_type lock_option;

  bool	drop_primary,drop_if_exists,local_file;

  bool  in_comment,ignore_space,verbose,simple_alter, option_type;

sql/sql_parse.cc

+27 −23
Original line number Diff line number Diff line
@@ -1761,7 +1761,9 @@ mysql_execute_command(void) 
				for (TABLE_LIST *cursor=(TABLE_LIST *)sl->table_list.first;cursor;cursor=cursor->next)

					cursor->table= ((TABLE_LIST*) cursor->table)->table;

			}

			ha_rows save_it=thd->offset_limit; thd->offset_limit=0;

      res=mysql_union(thd,lex, select_lex->select_number+1);

			thd->offset_limit=save_it;

		}

    close_thread_tables(thd);

    break;
@@ -2440,9 +2442,9 @@ mysql_init_select(LEX *lex) 
  SELECT_LEX *select_lex = lex->select;

  select_lex->where=select_lex->having=0;

  select_lex->select_limit=current_thd->default_select_limit;

  select_lex->offset_limit=0L;

  select_lex->offset_limit=0;

  select_lex->options=0; select_lex->linkage=UNSPECIFIED_TYPE;

  select_lex->select_number = 0;  lex->exchange = 0;

  select_lex->select_number = 0;  lex->exchange = 0; lex->union_option=0;

  lex->proc_list.first=0;

  select_lex->order_list.elements=select_lex->group_list.elements=0;

  select_lex->order_list.first=0;
@@ -2938,6 +2940,8 @@ static int link_in_large_list_and_check_acl(THD *thd,LEX *lex,SQL_LIST *tables) 
					aux->table=(TABLE *)ptr;

					link_in_list(tables,(byte*)ptr,(byte**) &ptr->next);

				}

				else

					aux->table=(TABLE *)cursor;

      }

    }

  }

sql/sql_unions.cc

+7 −5
Original line number Diff line number Diff line
@@ -72,10 +72,10 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects) 
					return res;

				}

				table=create_result->table;

				List_iterator<Item> it(*(create_result->fields));

/*				List_iterator<Item> it(*(create_result->fields));

				Item *item;

				while ((item= it++))

					fields.push_back(item);

				fields.push_back(item);*/

				if (!(resulting = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))

					return 1;

				resulting->db=tables->db ? tables->db : thd->db;
@@ -88,8 +88,8 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects) 
    }

    else // Then we do INSERT from SELECT

    {

      select_result *result;

      if ((result=new select_insert(table, &fields, DUP_IGNORE, true)))

			select_insert *result;

      if ((result=new select_insert(table, create_result->fields, DUP_IGNORE, true)))

      {

				res=mysql_select(thd,tables,sl->item_list,

												 sl->where,
@@ -104,7 +104,7 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects) 
				if (res) 

				{

					delete create_result;

					return 1;

					return res;

				}

      }

      else
@@ -142,6 +142,8 @@ int mysql_union(THD *thd,LEX *lex,uint no_of_selects) 
      result->abort();

		delete result;

  }

	else

		res=-1;

  delete create_result;

  return res;

}

sql/sql_yacc.yy

+7 −3
Original line number Diff line number Diff line
@@ -551,7 +551,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize); 
	table_to_table_list table_to_table opt_table_list opt_as

	handler_rkey_function handler_rkey_mode handler_read_or_scan

	single_multi table_wild_list table_wild_one opt_wild union union_list

	precision

	precision union_option

END_OF_INPUT



%type <NONE>
@@ -3404,7 +3404,7 @@ union: 
  | union_list



union_list:

  UNION_SYM  

  UNION_SYM    union_option

  {

    LEX *lex=Lex;

    if (lex->exchange) YYABORT; /* Only the last SELECT can have  INTO...... */
@@ -3412,3 +3412,7 @@ union_list: 
    mysql_new_select(lex); lex->select->linkage=UNION_TYPE;

  } 

	select



union_option:

  /* empty */ {}

  | ALL {Lex->union_option=1;}